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S.1 Motion Study Questions
Your Name:
1) When an object’s distance from another object is changing,
it is in motion.
it is moving at constant speed.
it has a high velocity.
it is accelerating.
2) As Earth orbits the sun, it is moving about
30 kilometers per hour.
300 kilometers per second.
3 kilometers per minute.
30 kilometers per second.
3) A place or object used for comparison to determine if something is in motion is called
a position.
a reference point.
a constant.
velocity.
4) Speed equals distance divided by
time.
velocity.
size.
motion.
5) When you know both the speed and direction of an object’s motion, you know the
average speed of the object.
acceleration of the object.
distance the object has traveled.
velocity of the object.
6) Average speed is
equivalent to velocity.
the rate at which an object is moving at a given instant.
the rate at which a slope changes.
the total distance traveled divided by the total time.
7) If you know the distance an object has traveled in a certain amount of time, you can determine
the size of the object.
the speed of the object.
the location of the object.
the acceleration of the object.
8) If the speed of an object does NOT change, the object is traveling at a
constant speed.
average speed.
increasing speed.
decreasing speed.
9) If a bicyclist travels 30 kilometers in two hours, her average speed is
30 km/h.
60 km/h.
15 km/h.
2 km/h.
10) If an object moves in the same direction and at a constant speed for 4 hours, which of the following is true?
The object’s speed changed during the 4 hours.
The object’s velocity did not change.
The object accelerated during the 4 hours.
The object decelerated during the 4 hours.
11) If you know a car traveled 300 kilometers in 3 hours, you can find its
acceleration.
direction.
average speed.
velocity.
12) A car travels 85 km in the first hour of a trip. The car continues to travel for 2 more hours and travels 200 km. What was the average speed of the car for the trip?
39 km/h
95 km/h
115 km/h
285 km/h
13) The rate at which velocity changes is called
instantaneous speed.
direction.
acceleration.
motion.
14) Which of these is an example of deceleration?
a bird taking off for flight
a roller coaster moving down a steep hill
a car approaching a red light
an airplane following a straight flight path
15) It is rare for any motion to
stay the same for very long.
change quickly.
increase in velocity.
decrease in speed.
16) Changing direction is an example of a kind of
acceleration.
speed.
velocity
constant rate.
17) The moon accelerates because it is
in a vacuum in space.
continuously changing direction.
a very large sphere.
constantly increasing its speed of orbit.
18) A runner rounding a curve on a track at a constant speed is an example of what type of acceleration?
changing direction
decreasing velocity
increasing velocity
instantaneous speed
19) To determine the acceleration rate of an object, you must calculate the change in speed during each unit of
velocity.
time.
motion.
deceleration
20) If speed is measured in kilometers per hour and time is measured in hours, the unit of acceleration is
hours.
kilometers per hour.
kilometers per hour per hour.
kilometers.
21) Which of the following is the correct equation for acceleration?
acceleration = (initial speed - final speed) / time
acceleration = time / (final speed initial speed) 2
acceleration = (final speed - initial speed x time
acceleration = (final speed - initial speed) / time
22) In a graph showing speed versus time, a straight line shows the acceleration is
decreasing.
increasing.
changing.
constant.
23) What kind of line on a distance-versus-time graph indicates that the object is accelerating?
Answer 1
Answer 2
Answer 3
Answer 4
24) The energy associated with motion is called
kinetic energy.
elastic potential energy.
gravitational potential energy.
nuclear energy.
25) Which of the following has kinetic energy?
energy of motion.
stored.
conserved.
not measurable.
26) Unlike kinetic energy, potential energy is
energy of motion.
stored.
conserved.
not measurable.
27) Potential energy that depends on height is called
kinetic energy.
gravitational potential energy.
elastic potential energy.
mechanical energy.
28) When you rub your hands together on a cold day, you use friction to convert
mechanical energy into thermal energy.
thermal energy into nuclear energy.
nuclear energy into electrical energy.
electrical energy into electromagnetic energy.
29) In a graph of distance versus time, the slope represents
displacement.
speed.
acceleration.
potential energy.
30) The rise of a line on a distance-versus-time graph is 400 km and the run is 50 hours. What is the speed of the object represented by this graph?
2000 km/h
450 km/h
350 km/h
8 km/h
31) Motion is measured relative to a reference point.
True
False
32) A meter is a place or object used for comparison to determine if something is in motion.
True
False
33) If a toy car traveling at 10 cm/s passes a toy car moving at 10 cm/s in the opposite direction, both cars have the same velocity.
True
False
34) A child riding on a merry-go-round is accelerating because his direction is changing
True
False
35) The SI unit of velocity is the meter per second per second.
True
False
36) A straight line on a graph of speed-versus-time means that the object has a constant acceleration
True
False
37) The kinetic energy of a book on a shelf is equal to the work done to lift the book to the shelf.
True
False
38) A compressed spring has elastic potential energy.
True
False
39) A helicopter flies 100 km to the north and then flies 50 km to the east. The helicopter has traveled a total displacement of 150 km.
True
False
40) Displacement is the length and direction that an object has moved from its starting point.
True
False
41) You are riding in a car traveling at 80 km/h. A fly trapped in the car rests on your shoulder. Describe the speed of the fly using two different reference points.
Answer:
42) You are in a speedboat on a river moving in the same direction as the current. The speedometer on the boat shows that its speed is 20 km/h. However, a person on the shore measures the boat’s speed as 23 km/h. How is this possible?
Answer:
43) Explain how to find the average speed of a car that travels 300 kilometers in 6 hours. Then find the average speed.
Answer:
44) People living at Earth’s equator are traveling at a speed of about 1,670 km/h as Earth spins on its axis. Are these people being accelerated? Explain.
Answer:
45) Car A is traveling north at 30 m/s and car B is traveling south at 30 m/s. If both cars have a southward acceleration of 1 m/s2, compare their speeds after 1 second. Explain your comparison.
Answer:
46) A roller coaster is moving at 10 m/s at the top of a hill and 22 m/s at the bottom of the hill two seconds later. Explain how to find the average acceleration of the roller coaster, and then find the average acceleration.
Answer:
47) A 1-kg cart slams into a stationary 1-kg cart at 2 m/s. The carts stick together and move forward at a speed of 1 m/s. Determine whether kinetic energy was conserved in the collision. Use the law of conservation of energy to explain the collision.
Answer:
48) How high must you lift a 25-newton book for it to have the same increase in potential energy as a 20-newton book that was lifted 0.5 m?
Answer:
Printable Version
Last Modified: Wednesday, Nov. 17, 2010
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